[SOLVED] Network Issues

korsairtuga · 09-30-2013, 05:27 PM

I need some clues to find an answer to my networking issues.

While running several Linux systems, both live or installed on my hard drive, I noticed that when using Bittorrent Sync at full speed or copying files trough Samba shares also at great speed my connection speed drops when 1GB as been transferred.

Following that even SSH becomes painful. I can see no error on the logs and when I reboot everything is OK again.

I have installed a new Asus Gigabit network card after my on board one died. Connection to router is made trough a brand new powerline pair, even swapped the router and the results were the same. I tried ping http://www.google.pt and it started at time=13.8 ms, after the drop it becomes time=65180 ms.

Any advice would be great!

evo2 · 09-30-2013, 11:37 PM

Hi,

do you see such slowdowns if you restrict the transfers to only be within your private network? If not, it sounds like your ISP is throttling your throughput. If you do, then what sort of router are you using, and did you investigate its settings?

Evo2.

korsairtuga · 10-01-2013, 12:01 AM

Quote:

Originally Posted by evo2

Hi,

do you see such slowdowns if you restrict the transfers to only be within your private network? If not, it sounds like your ISP is throttling your throughput. If you do, then what sort of router are you using, and did you investigate its settings?

Evo2.

I've taken my ISP modem off the circuit using another router and the issue is still there.
The modem/router is a Thomson TG784 and the router is a Dlink DIR-615. Tried with each one alone after a factory reset and the results were the same, also, it's not happening on any other Linux machine I have.
Already swapped Ram to no better result.

Any logs I can look at?

evo2 · 10-01-2013, 12:11 AM

Hi,

Quote:

Originally Posted by korsairtuga

I've taken my ISP modem off the circuit using another router and the issue is still there.
The modem/router is a Thomson TG784 and the router is a Dlink DIR-615. Tried with each one alone after a factory reset and the results were the same,

Ok, that's useful information.

Quote:

also, it's not happening on any other Linux machine I have.

Hmm, that wasn't clear to me from your first post, in particular because you said:

Quote:

While running several Linux systems, both live or installed on my hard drive

Quote:

Any logs I can look at?

Yes, look in /var/log/. Exactly which log file will depend on what is causing the problems and what distro you are using. I'd be starting with /var/log/messages and /var/log/syslog and also looking at dmesg.

Just a thought: have you been able to reproduce this problem using something other than bittorrent sync?

Evo2.

korsairtuga · 10-01-2013, 12:23 AM

Quote:

Originally Posted by evo2

Hmm, that wasn't clear to me from your first post, in particular because you said:

Evo2.

Oops, sorry about that.

Quote:

Originally Posted by evo2

Just a thought: have you been able to reproduce this problem using something other than bittorrent sync?

Evo2.

Yes, trying a large Samba copy operation and also trough FTP of the same files.

evo2 · 10-01-2013, 12:29 AM

Hi,

ok, so did you find anything interesting poking around in the logs?

Evo2.

korsairtuga · 10-01-2013, 12:34 AM

Quote:

Originally Posted by evo2

Hi,

ok, so did you find anything interesting poking around in the logs?

Evo2.

I'm @work right now

, I will look at them as soon I am @home.

korsairtuga · 10-01-2013, 01:05 AM

I need to correct one thing, the router is a DIR-815. Noticed that both the router and the modem/router are Fast Ethernet devices and my network card is Gigabit, can this be part of the issue?

korsairtuga · 10-01-2013, 07:34 AM

Now @home running some tests. Running Openelec 3.1.2 x64.

Started by collecting all the logs in /var/log, all that have something worth looking were pasted here:

cat /var/log/messages http://paste.ubuntu.com/6179068/

cat /var/log/Xorg.0.0.log http://paste.ubuntu.com/6179082/

cat /var/log/log.nmbd http://paste.ubuntu.com/6179083/

Then I started testing my internet connection, through SSH with:

10 times wget -O /dev/null http://proof.ovh.net/files/100Mb.dat

1 time wget --output-document=/dev/null http://speedtest.wdc01.softlayer.com...ds/test500.zip

Every log was the same and with no drops, it's possible I should have insisted on this tests, but it had transferred 1,5 GB of data already.

Went on trying a Samba test with a 5GB folder with mp3 files that ran at 40Mbits until the drop.

Then SSH becomes very slow and on the messages that start appearing on cat /var/log/messages date and time are not set correctly, data is coming trough SSH really slow now.

korsairtuga · 10-01-2013, 08:01 AM

The log is not yet completed, really slow.
I noticed the time changed from log to log and Openelec is set to use an NTP server, can this be because the system cannot reach the NTP server then by not syncing the time it drops the speed? And should not the time be set correctly even when not reaching the server?

korsairtuga · 10-01-2013, 08:28 AM

My machine rebooted, crap!
So I got the file trough an usb drive, but noticed that the time on this log is different of the other that was coming through SSH, is this strange?

Finally, the log!
http://paste.ubuntu.com/6179353/

Only difference is this:

Quote:

Oct 1 10:38:42 OpenELEC daemon.info connmand[328]: ntp: time slew +2.574280 s
Oct 1 10:55:49 OpenELEC daemon.info connmand[328]: ntp: time slew +2.599594 s
Oct 1 11:00:36 OpenELEC daemon.info connmand[328]: Setting domainname to lan
Oct 1 11:30:39 OpenELEC daemon.info connmand[328]: eth0 {del} address 192.168.1.82/24 label eth0
Oct 1 11:30:39 OpenELEC daemon.info connmand[328]: eth0 {del} route 192.168.1.0 gw 0.0.0.0 scope 253 <LINK>
Oct 1 11:30:39 OpenELEC daemon.info avahi-daemon[594]: Withdrawing address record for 192.168.1.82 on eth0.
Oct 1 11:30:39 OpenELEC daemon.info avahi-daemon[594]: Leaving mDNS multicast group on interface eth0.IPv4 with address 192.168.1.82.
Oct 1 11:30:39 OpenELEC daemon.info avahi-daemon[594]: Interface eth0.IPv4 no longer relevant for mDNS.
Oct 1 11:30:48 OpenELEC daemon.info connmand[328]: eth0 {add} address 169.254.226.148/16 label eth0 family 2
Oct 1 11:30:48 OpenELEC daemon.info connmand[328]: eth0 {add} route 169.254.0.0 gw 0.0.0.0 scope 253 <LINK>
Oct 1 11:30:48 OpenELEC daemon.info connmand[328]: eth0 {add} route 0.0.0.0 gw 0.0.0.0 scope 253 <LINK>
Oct 1 11:30:48 OpenELEC daemon.info avahi-daemon[594]: Joining mDNS multicast group on interface eth0.IPv4 with address 169.254.226.148.
Oct 1 11:30:48 OpenELEC daemon.info avahi-daemon[594]: New relevant interface eth0.IPv4 for mDNS.
Oct 1 11:30:48 OpenELEC daemon.info avahi-daemon[594]: Registering new address record for 169.254.226.148 on eth0.IPv4.

korsairtuga · 10-01-2013, 08:37 AM

The Samba log is really different:

http://paste.ubuntu.com/6179392/

korsairtuga · 10-01-2013, 12:07 PM

This is bugging me

Quote:

Oct 1 16:26:16 openelec daemon.info connmand[286]: eth0 {del} address 192.168.1.82/24 label eth0
Oct 1 16:26:16 openelec daemon.info connmand[286]: eth0 {del} route 192.168.1.0 gw 0.0.0.0 scope 253 <LINK>
Oct 1 16:26:16 openelec daemon.info avahi-daemon[533]: Withdrawing address record for 192.168.1.82 on eth0.
Oct 1 16:26:16 openelec daemon.info avahi-daemon[533]: Leaving mDNS multicast group on interface eth0.IPv4 with address 192.168.1.82.
Oct 1 16:26:16 openelec daemon.info avahi-daemon[533]: Interface eth0.IPv4 no longer relevant for mDNS.
Oct 1 16:26:26 openelec daemon.info avahi-daemon[533]: Joining mDNS multicast group on interface eth0.IPv4 with address 169.254.226.148.
Oct 1 16:26:26 openelec daemon.info avahi-daemon[533]: New relevant interface eth0.IPv4 for mDNS.
Oct 1 16:26:26 openelec daemon.info connmand[286]: eth0 {add} address 169.254.226.148/16 label eth0 family 2
Oct 1 16:26:26 openelec daemon.info avahi-daemon[533]: Registering new address record for 169.254.226.148 on eth0.IPv4.
Oct 1 16:26:26 openelec daemon.info connmand[286]: eth0 {add} route 169.254.0.0 gw 0.0.0.0 scope 253 <LINK>
Oct 1 16:26:26 openelec daemon.info connmand[286]: eth0 {add} route 0.0.0.0 gw 0.0.0.0 scope 253 <LINK>

I think this is the drop, why does the IP changes?

korsairtuga · 10-01-2013, 03:23 PM

Ok, the saga is over. There's a no solve bug on the network card, I've returned it already.
The card was this: Sundance Technology Inc / IC Plus Corp IP1000 Family Gigabit Ethernet (rev 41) (Asus NX1101)
The bugs are in the link.
http://goo.gl/psUgjc

Anyone knows of a good Realtek based PCI Ethernet card?